Africa - Central Africa - Sahel Africa - South Asia - East Siberia Asia - Indonesia Asia - North Central Asia - South Central Asia and China Asia - Southeast Asia and India Asia - West Siberia Australia Europe Global - Land Middle East and Sahara North America - Alaska and Northern Canada North America - Central America North America - Eastern United States North America - Southern Canada North America - Western United States South America - Amazon South America - Southeast South America - Southwest

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.47
I123	[-]	4.64	5.10	3.54	0.0804			3.86		0.413	0.598	0.506
post5.4	[-]	3.76	4.18	3.54	0.0727			1.78		0.572	0.673	0.623

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	5.23
I123	[-]	6.09	5.45	5.20	0.0332	0.000959		0.530		0.189	0.658	0.424
post5.4	[-]	5.90	5.30	5.20	0.0319	0.000959		0.298		0.191	0.674	0.432

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	4.53
I123	[-]	12.3	11.7	4.47	0.649	0.000112		8.53		0.185	0.468	0.327
post5.4	[-]	11.6	11.1	4.47	0.606	0.000112		7.79		0.193	0.497	0.345

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.06
I123	[-]	0.832	0.776	1.08	0.0558			-0.785		0.582	0.861	0.722
post5.4	[-]	1.19	1.11	1.08	0.0819			0.437		0.508	0.865	0.686

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	2.20
I123	[-]	3.82	2.78	2.21	1.03	0.00166		5.94		0.351	0.499	0.425
post5.4	[-]	2.65	1.89	2.21	0.749	0.00166		1.27		0.763	0.845	0.804

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	6.28
I123	[-]	4.64	4.36	6.41	0.119			-2.27		0.418	0.759	0.588
post5.4	[-]	4.46	4.18	6.41	0.114			-2.48		0.384	0.720	0.552

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	17.5
I123	[-]	8.48	8.06	17.4	0.446			-5.03		0.369	0.827	0.598
post5.4	[-]	7.22	6.90	17.4	0.364			-5.73		0.347	0.720	0.533

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	6.61
I123	[-]	5.62	5.14	6.60	0.521	0.000314		-1.53		0.405	0.851	0.628
post5.4	[-]	4.98	4.57	6.60	0.443	0.000314		-2.49		0.435	0.907	0.671

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.30
I123	[-]	1.09	1.04	1.35	0.0607			-0.875		0.508	0.725	0.617
post5.4	[-]	1.23	1.18	1.35	0.0687			-0.432		0.480	0.771	0.625

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.77
I123	[-]	4.12	3.44	3.77	0.686	0.00216		0.0939		0.446	0.895	0.670
post5.4	[-]	4.08	3.42	3.77	0.659	0.00216		0.0447		0.470	0.895	0.682

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	4.91
I123	[-]	3.52	3.04	4.89	0.424	0.00238		-3.04		0.436	0.905	0.670
post5.4	[-]	3.41	2.94	4.89	0.413	0.00238		-3.28		0.433	0.839	0.636

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	88.2
I123	[-]	96.7	89.7	88.2	6.73	0.00803		0.487		0.407	0.747	0.577
post5.4	[-]	85.5	79.3	88.2	5.95	0.00803		-0.368		0.447	0.800	0.623

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.41
I123	[-]	2.35	2.12	3.41	0.248			-0.689		0.765	0.690	0.728
post5.4	[-]	2.12	1.92	3.41	0.218			-0.823		0.773	0.626	0.699

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.56
I123	[-]	1.85	1.58	3.61	0.235			-3.61		0.353	0.464	0.408
post5.4	[-]	2.05	1.76	3.61	0.262			-3.25		0.350	0.504	0.427

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.98
I123	[-]	2.83	2.23	1.98	0.553	0.000448		2.79		0.416	0.751	0.584
post5.4	[-]	2.61	2.10	1.98	0.471	0.000448		2.02		0.451	0.840	0.645

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	4.09
I123	[-]	6.92	6.41	4.06	0.363			6.70		0.283	0.299	0.291
post5.4	[-]	4.82	4.45	4.06	0.290			1.43		0.380	0.589	0.485

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	2.46
I123	[-]	2.66	2.38	2.49	0.308			-0.0496		0.444	0.556	0.500
post5.4	[-]	2.43	2.15	2.49	0.283			-0.501		0.452	0.376	0.414

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.85
I123	[-]	1.66	1.78	3.82	0.0276			-4.92		0.265	0.768	0.516
post5.4	[-]	1.58	1.65	3.82	0.0201			-5.32		0.269	0.563	0.416

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	6.52
I123	[-]	12.3	11.8	6.58	0.433			6.65		0.278	0.961	0.619
post5.4	[-]	8.87	8.46	6.58	0.355			2.48		0.680	0.788	0.734

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.44
I123	[-]	8.89	8.71	3.43	0.230			8.51		0.224	0.720	0.472
post5.4	[-]	8.42	8.25	3.43	0.230			7.78		0.247	0.761	0.504

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.80
I123	[-]	2.02	1.83	1.75	0.197	4.31e-06		0.764		0.557	0.826	0.692
post5.4	[-]	2.00	1.81	1.75	0.188	4.31e-06		0.660		0.554	0.826	0.690

Africa - Central Africa - Sahel Africa - South Asia - East Siberia Asia - Indonesia Asia - North Central Asia - South Central Asia and China Asia - Southeast Asia and India Asia - West Siberia Australia Europe Global - Land Middle East and Sahara North America - Alaska and Northern Canada North America - Central America North America - Eastern United States North America - Southern Canada North America - Western United States South America - Amazon South America - Southeast South America - Southwest Temporally integrated period mean Temporally integrated period mean bias Temporally integrated period mean bias score

  Title:

Biological Nitrogen Fixation

  Version:

1

  Institutions:

University of Exeter

  Source:

A comprehensive global meta analysis of field measurements

  History:

2020-12-14: obtained dataset 2020-12-14: converted to netCDF

  References:

Davies-Barnard, T. and Friedlingstein, P. (2020), The Global Distribution of Biological Nitrogen Fixation in Terrestrial Natural Ecosystems, Global Biogeochemical Cycles, 3, doi:10.1029/2019GB006387

  Comments:

time_period: single estimate from 1980 through 2019

temporal_resolution: monthly

spatial_resolution: 0.5 degree

units: kg m-2 s-1

  Convention:

CF-1.8